Dense Fog in Louisiana
Every dense fog event the National Weather Service has filed in Louisiana, year by year, with the most significant episodes. Fog reducing visibility to a quarter mile or less, filed where it caused accidents or disruption.
The most significant on the map
The most significant dense fog episodes in Louisiana.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The record
- Events
- 13
- Deaths
- 12
- Injuries
- 195
- Damage
- $4.3 million
Every year
The most significant
Ranked by deaths, injuries, damage and size together.
- Dense Fog in Louisiana, October 23, 2023Typical radiation fog forms when the surface quickly cools at night to become nearly saturated and can become dense when conditions trap more moisture near the surface, usually in the presence of high pressure as what was observed on 10/23.
- Dense Fog in Louisiana, December 29, 2011Localized dense fog contributed to a 40 vehicle traffic accident on Interstate 10 during the early morning hours.
- Dense Fog in Louisiana, January 12, 2006Over 100 vehicles were damaged along Interstate 49 near Carencro in several dense fog accidents. One man was killed after being trapped in his car after it burst into flames.
- Dense Fog in Louisiana, January 14, 1999Dense fog reduced visibility and contributed to 23 separate collisions involving a total of 90 vehicles on the Interstate Highway 10 bridge near the Bonnet Carre Spillway.
- Dense Fog in Louisiana, November 5, 2025At approximately 4 am on November 5th, very localized dense superfog developed near a low lying creek valley along I-49 at mile marker 162 near the intersection of Highway 177 in extreme Southeast Desoto Parish.
- Dense Fog in Louisiana, April 2, 2007After a day of area rains, the area cleared and conditions were favorable for fog development. Widespread dense fog developed during the morning hours of April 2nd.
- Dense Fog in Louisiana, December 17, 2008Dense morning fog across St. Landry Parish contributed to a vehicle accident on U.S. Highway 167 about two miles north of Plaisance. The crash between a school bus and car caused minor injuries to 6 children. Visibilities were reported to be near zero in the area.
- Dense Fog in Louisiana, March 8, 2007Dense fog resulted in numerous auto accidents across the Lake Charles area.
- Dense Fog in Louisiana, January 10, 2000In Jennings, an elderly man ran a stop light in dense fog, and hit another car in the intersection. The 39 year old woman in the other car was treated and released from the hospital.
- Dense Fog in Louisiana, December 19, 1999A man suffered severe injuries when his truck ran off the road into a culvert and deep ditch in De Quincy. His injuries included a crushed foot and leg, and broken ribs and wrists.
- Dense Fog in Louisiana, December 31, 1996Dense fog and the accompanying wet road conditions contributed to a series of automobile accidents, involving approximately 100 automobiles, on the Interstate Highway 10 Twin Span Bridge over Lake Pontchartrain.
- Dense Fog in Louisiana, January 14, 1998Dense fog caused 3 tractor-trailer rigs and 1 vehicle to collide on I-20 near Simsboro. No injuries occurred.
- Dense Fog in Louisiana, October 16, 2000A combination of fog and smoke from a swamp fire contributed to a four vehicle accident on Highway 641 that resulted in the death of two people.
More
Sources
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24.